default PAM service name is <literal>postgresql</literal>. You can
optionally supply your own service name after the <literal>pam</>
key word in the file <filename>pg_hba.conf</filename>.
- PAM is used only to validate username/password pairs,
- therefore the user must already exist in the database before PAM
+ PAM is used only to validate username/password pairs.
+ Therefore the user must already exist in the database before PAM
can be used for authentication. For more information about
PAM, please read the <ulink url="http://www.kernel.org/pub/linux/libs/pam/">
<productname>Linux-PAM</> Page</ulink>